Caddisfly Larva from The Netherlands

water insect
Location: Eindhoven, The Netherlands
October 3, 2011 2:12 am
These are crowling on the bottom of my pond in the backgarden. We live in Eindhoven The Netherlands.
Please can you tell me what bug this is?
Signature: Ine Marijke

Caseworm

Dear Ine,
You have photographed the larva of a Caddisfly.  Caddisfly larvae are aquatic and they build cases from various materials, including sand, gravel, shells and twigs.  Each species of Caddisfly builds a different type of case.  Because of this trait, Caddisfly Larvae are frequently called Caseworms.

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Location: Netherlands